Display Panel Light Detection Inspection Using Reflective Frame Analysis
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Solution Overview
Problem
Existing display devices face challenges in efficiently evaluating light detection characteristics, particularly in portable devices that require biometric information detection, such as smartphones and tablets, which are not adequately addressed by current inspection methods.
Innovation Solution
A display panel inspection device with a loading plate, reflective plate, and light characteristics inspection control unit that converts light sensing signals into data frames for comparison with reference data, creating a dark room environment, and switching reflective plate directions to inspect light detection characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional inspection methods are used for display devices, then general display quality can be evaluated, but light detection characteristics for biometric information cannot be adequately assessed
Solution Approach 1:
The inspection device segments the evaluation process into distinct functional components: a light emitting unit that projects specific light patterns, a light sensing unit that detects reflected light from the display panel, and a control unit that processes the detected signals. This segmentation allows specialized evaluation of light detection characteristics while maintaining compatibility with general display inspection through modular architecture.
Solution Approach 2:
The display panel itself serves as an intermediary element in the inspection process. Instead of directly testing biometric detection functionality, the inspection device uses the display panel as a mediator by having it emit light that is then reflected back and detected by the sensing unit, thereby evaluating light detection characteristics through the panel's optical properties.
2Reliability
If existing inspection devices are used, then manufacturing efficiency is maintained, but accurate evaluation of biometric detection functionality is not achieved
Solution Approach 1:
The inspection device performs preliminary evaluation of light detection characteristics during the manufacturing process itself. By integrating the light emitting and sensing units into the inspection system, the device can assess biometric detection functionality before final product assembly, allowing early detection and correction of issues without compromising production throughput.
Solution Approach 2:
The display panel is utilized to serve dual purposes: it functions as both the product being inspected and as part of the inspection system. The panel's light emitting capability is harnessed to generate the test light, eliminating the need for separate external light sources and simplifying the inspection setup while maintaining manufacturing efficiency.
3Measurement precision
If comprehensive light detection evaluation is implemented, then biometric detection accuracy is ensured, but inspection device complexity increases
Solution Approach 1:
The inspection device is designed with multi-functional components that can perform multiple operations. The light emitting unit can generate different light patterns for various test conditions, the light sensing unit can detect different wavelengths and intensities, and the control unit can process multiple types of data. This universality allows comprehensive light detection evaluation without requiring separate specialized equipment for each function, thereby managing complexity while maintaining measurement precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively evaluates light detection characteristics of display panels by assessing linear light detection and dynamic range, determining product quality, and ensuring accurate biometric information detection.
Implementation Method 1
a reflective plate disposed along a first or second direction to face a display panel of the display device
Data Source
AI summary
The present disclosure relates to a display panel inspection device. According to an embodiment of the disclosure, an inspection device includes a loading plate on which a display device is disposed, a reflective plate disposed along a first or second direction to face a display panel of the display device, and a light characteristics inspection control unit controlling a light emitting driving of the display panel and detecting light sensing signals through the display panel to inspect light detection characteristics of the display panel. The light characteristics inspection control unit is configured to inspect the light detection characteristics of the display panel by converting the light sensing signals into light sensing data in units of at least one frame and comparing the light sensing data in units of at least one frame with reference frame data.